Portable electric heater



FIG. 1 shows a front perspective view of a portable electric heater incorporating our design;

FIG. 2 shows a left side perspective view of the portable electric heater shown in FIG. 1, the opposite side being substantially identical to that shown except for the control knobs; and,

FIG. 3 shows a top plan view of the portable electric heater shown in FIG. 1.

The rear and the bottom of the design are flat and unornamented. 

The ornamental design for a portable electric heater, as shown and described. 